Method for the purification of isocyanates

US7358388B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Andreas Woelfert · Bad Rappenau, DE
• Hans-Juergen Pallasch · Ludwigshafen, DE
• Eckhard Stroefer · Mannheim, DE
• Heinrich-Josef Blankertz · Hamm (Sieg), DE

Key dates

• Filing date: Dec 16, 2003
• Grant date: Apr 15, 2008
• Expiry date: Nov 16, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C263/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Isocyanates are prepared by a process in which a product stream from the isocyanate synthesis is purified.